申请人 |
SCHLUMBERGER CANADA LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;SCHLUMBERGER TECHNOLOGY CORPORATION;JEFFRYES, BENJAMIN P.;JOHNSON, ASHLEY BERNARD |
发明人 |
JEFFRYES, BENJAMIN P.;JOHNSON, ASHLEY BERNARD |